<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script>
			var arr=['买','不买','买','不买','不买'];
			//var num=Math.floor(Math.random()*(arr.length-1+1-0)+0);
			//document.write(arr[num]);
			var num=Math.random()*10;
			if(num<8)
			{
				document.write('不买');
			}
			else
			{
				document.write("买");
			}
			
			
		</script>
	</head>
	<body>
	</body>
</html>
